Baffle attachment for a heating coil surrounding a combustion tube burner



June 17, 1947. M. A, KENRCK 2,422,488

BAFFLE ATTACHMENT FOR A HEATING COIL SURROUNDING A COMBUSTION TUBEBURNER Filed July 18, 1945 Patented June 17, 1947 BAFFLE ATTACHMENT FORA HEATING COIL SURROUNDING A COMBUSTION TUBE BURNER Marie AndersenKenrick, South Yarmouth, Mass.

Application July 18, 1945, Serial No. 605,814

5 Claims.

This invention relates to a bafiie attachment for a hot water heatingcoil such, for example, as is, used with a conventional domestic oilburner of the type illustrated in United States Patent No. 1,764,794granted June 17, 1930, and its prinicipal objects are to provide anattachment which is capable of greatly increasing the heating efficiencyof the burner and to provide an attachment which is of simple design anddurable construction, which may be readily applied to a heating coil andwhich may be manufactured at a relatively low cost.

Further objects relate to various features of construction and will beapparent, from a consideration of the following description andaccompanying drawings, wherein Fig. 1 is an elevation, with parts brokenaway, of a conventional domestic oil burner having a heating coilequipped with a baflleattachment constructed in accordance with thepresent invention;

Fig. 2 is a perspective view of the baffle plate;

Fig. 3 i a perspective View of the supporting member for the baiileplate; and

Fig. 4 is a modified form of the baffle plate.

The embodiment herein shown for the purpose of illustration comprises aconventional oil burner of the type illustrated in the aforementionedpatent which is provided with a conventional hot water heating coil 2,here shown as having six convolutions between its intake end 4 and itsdischarge end 5. If desired, a perforate shield 6 may be circumposedabout the coil 2, as illustrated in Fig. 1.

The battle attachment comprises an annular member I formed of suitablesheet metal and of a size conforming to the diameter of the convolutionsof the heating coil 2, and a plurality of resilient U-shaped metal clipsH depending from its undersurface and adapted to clamp about the upperconvolutions a and b of the heating coil 2 so as to anchor the annularmember I0 firmly in substantially horizontal position on the top of thecoil, as illustrated in Fig. 1. The annular member I0 supports aremovable lid or bafiie member l5 which comprises an upper perforatecircular plate I6 of suitable sheet metal having a diameter exceedingthe inner diameter of the annular member l0, and a lower perforate platel8 of suitable sheet metal having a diameter substantially less than theinner diameter of the annular member ID. The upper and lower plates areconnected by a plurality of spacers, consisting of reversely bent metalstrips 20 which are welded, riveted or otherwise secured to the platesso as to maintain them in predetermined spaced parallel relation.

It has been found that the spacing between the plates l6 and I8 has amarked effect on the heat transferred to the coil and. in accordancewith the preferred aspect of the invention the spacers 20 are adjustableby being bent transversely in one direction or the other about theirapproximate centers 2| (Fig. 2) so as to vary the effective spacingbetween the two plates. Thus, the spacers may be bent so as to maintainthe plates I6 and I8 spaced apart from a practical minimum ofapproximately 1 inch or less to a maximum of 3 inches or more. However,a spacing of the order of 2 inches has been found to be the optimum forthe majority of installations.

In many cases it may be advisable, particularly Where a constant flameis used, to employ a bafile having a fixed setting between its upper andlower plates, in which event a baffie member 15* (Fig. 4) may beadvantageously used. This modified form of bafile member comprises anupper plate I6 which may be the same in all material particulars as theplate iii of the embodiment of Fig. 2, and a lower plate l8 consistingof a dished member having an upstanding flaring side 24, the upper edgeof which is welded or otherwise suitably secured to the undersurface ofthe upper plate. The diameter at the upper edge of the plate l8 issubstantially less than the inner diameter of the annular member Ill andthe side wall 24 permanently holds the two plates in fixed spacedparallel relation, preferably approximately 2 inches apart, which hasbeen found to be the optimum distance for most installations.

In order to permit removal and replacement of the baffle member 15 or [5the upper plate may be provided with a handle 25, here shown asconsisting of an inverted U-shaped member.

A baffle attachment constructed in accordance with the present inventionhas been found to increase the elficiency of a hot water heatinginstallation of the type herein illustrated from 10 to 30% or moredepending upon the setting or adjustment of the fiame. A furtheradvantageous feature of my new attachment is that it may be readilyremoved for cleaning and replaced without; the slightest difficulty.Moreover, the constituent parts of the attachment may be readilyfabricated from sheet metal by the usual stamping operations and theparts may be quickly assembled by relatively unskilled operators, thusinsuring economy of production.

While I have shown and described difierent desirable embodiments of theinvention it is to be understood that this disclosure is for the purposeof illustration and that various changes or modifications in shape,proportion, and arrangement of parts may be made without departing fromthe spirit and scope of the invention as set forth in the appendedclaims.

I claim:

1. A baille attachment for a heating coil cire cumposed about a burner,comprising an annular member having a plurality of circumferentiallyspaced clips adapted to grip the upper convolution of saidheating coilso as to anchor the annular member at the top of said coil insubstantially horizontal position, and a baffle member supported by saidannular member and including an upper circular plate having a diameterexceeding the inner diameter of said annular member so as to rest onsaid annular member, a lower circular plate having .a diametersubstantially less than the inner diameter of said annular member so asto fit within said annular member, and spacing means connecting the twocircular plates so as to maintain them in predetermined spaced parallelrelation,

2. A' baflle attachment for a heating coil circumposed about a burner,comprising an annular member having a plurality of circumferentiallyspaced depending clips adapted to grip the upper convolutions of saidheating coil so as to anchor the annular member at the top of said coilin substantially horizontal position, and a baille member supported bysaid annular member and including an upper circular perforate platehaving a diameter exceeding theinner diameter of said annular member soas to rest on said annular member, a lower circular perforate platehavingJa diameter substantially less than the inner diameter of saidannular member so as to fit within said annular member, and spacingmeans connecting the two circular plates so as to maintain them inpredetermined spaced parallel relation.

3. A baffle attachment for a heating coil circumposed about a burner,comprising an annular member having a plurality of circumferentiallyspaced clips adapted to grip the upper convolution of said heating coilwas to anchor the annular member at the top of said coil insubstantially horizontal position, and a baille member supported by saidannular member and including an upper circular plate having a diameterexceeding theinner diameter of said annular member so as to rest on saidannular member, a lower circular plate having a diameter substantiallyless than the inner diameter of said annular member so as to fit withinsaid annular member, and spacers consisting of a plurality of reverselybent metal strips secured to the upper and lower circular plates so asto maintain said plates in predetermined spaced parallel relation,

said strips being transversely bendable so as to vary the effectivespacingrbetween said plates.

4. A baffle attachment for a heating coil circumposed about a burner,comprising an annular member having a plurality of circumierentiallyspaced depending U-shaped resilient clips adaptsaid annular member, alower circular plate having a diameter substantially less than theinner. diameter of said annular member so as to fit Within said annularmember, and spacing means connecting the two circular plates so as tomaintainthem in predetermined spaced parallelrelation.

5. A bafile attachment for a heating coil circumposed about a burn-er,comprising an annular member having a plurality of circumferentiallyspaced clips adapted to grip the upper convolution of asid heating coilso as to anchor the annular member at the top of said coil insubstantially horizontal position, and a baflle member supported by saidannular member and including aflat circular upper perforate plate havinga diameter greater than c the inner diameter of said annular member soas to rest on said annular member and a dished lovver plate having adiameter substantially less than the inner diameter of said annularmember so as to fit within said annular member, the upper edge of saidlower plate being secured against the undersurface of said upper plateso as to hold the body portions of the two plates in predeterminedspaced parallel relation.

MARIE ANDERSEN KENRICK.

' REFERENCES CITED The following references are of record in the file ofthis patent: Y i 7

